Azzano Decimo (Western Friulian: Dassan) is a comune (municipality) in the regional decentralization entity of Pordenone, in the Italian region of Friuli-Venezia Giulia, located about 90 kilometres (56 mi) northwest of Trieste and about 11 kilometres (7 mi) southeast of Pordenone. As of 31 December 2004, it had a population of 13,711 and an area of 51.4 square kilometres (19.8 mi²).

The municipality of Azzano Decimo contains the frazioni (boroughs) of Corva, Fagnigola, and Tiezzo.

Azzano Decimo borders the following municipalities: Chions, Fiume Veneto, Pasiano di Pordenone, Pordenone, Pravisdomini.